Fire-extinguisher.



G. T. PEARSONS.

FIRE EXTINGUISHER.

APPLICATION FILED APR.5, 1916. RENEWED IAN. 17.1911.

- Patented Aug. 21, 191 7.

I 6 90) eTPearsons 3 aflozuc%g Q GEORGE T. PEARSONS, OF NEW YORK, N. Y.

FIRE-EXTINGUISHER.

Specification of Letters Patent.

Patented Aug. 21, 1917.

Application filed April 5, 1916, Serial No. 89,007. Renewed January 17, 1917. Serial No. 142,959.

To all whom it may concern:

Be it known that I, GEORGE T. PEARSONS, a citizen of the United States, residing in the borough of Manhattan, in the city, county, and State of New York,'have invented new and useful Improvements in Fire-Extinguishers, of which the following is a specification.

This invention relates to'fire extinguishers in which a fire extinguishing liquid, such as carbon tetrachlorid, is discharged from a reservoir by an expelling agent or gas generated in the reservoir, the production of 'such gas being the reaction between suitable materials, such as bicarbonate of soda and sulfuric or hydrochloric acid, normally maintained in a separated condition within the reservoir, and one of said materials, preferably the acid, being contained in a fragile receptacle which may be readily ruputilize the extinguisher 'such receptacle is broken causing the gas generating mate= rials to mix and generate gas and the expansive force of such gas expelling the liquid from the reservoir; and it is the primary object of the present invention to simplify and improve the general construetion of extinguishers of this character to therebycheap'en the cost of manufacture and increase the efficiency thereof.

A further object of the invention is to provideimproved means to hold the gas generating materials in a separated condition in the reservoir and such materials with the reacting mixture free from the liquid in the tank.

A further object of the invention is to provide improved means to support the acid erating material.

carrier and to rupture or break said carrier to cause it to mix with the other gas gen- In the drawing accompanying and forming a part of this specification Figure 1 is a sectional side elevation of a fire extinguisher, illustrating an embodiment of my invention.

Fig. 2 is a plan view; and Fig. 3 is a sectional detail taken on the line 3-3 of Fig. 2 looking in the direction of the arrow, showing the means to maintain the gas generating materials and the reacting mixture free from the liquid in the reservoir.

' Similar characters of reference designate This outlet consists 0 an opening in the head communicating with the exterior of the reservoir is a discharge tube 8, the said tube extending to adjacent the bottom of the reservoir with such end closed by a check valve closing into and opening outward from the reservoir, as shown at 9. Communication to the exterior of the reservoir through said tube may be shut off by a valve 10 to which is connected by a fitting 11 the usual flexible nozzle tipped hose 12.

Suspended in the reservoir from the opening in the head 6 is a receptacle 13, the said receptacle having a screw threaded connection with said opening whereby it may be removed from the reservoir. This receptacle is adapted to contain a gas. generating material, such as bicarbonate of soda, and has an outlet leadin into the reservoir. a tube 14 secured in an opening in the receptacle adjacent the top, as shown in Fig. 3, and is bent at an angle so that the outer end will be in line with an enlarged opening 15 in the reservoir head 6. Communication between the reservoir and the receptacle is shut ofi by a normally closed valve consisting of a ball 16 cooperating with a valve seat formed in the outer end of the tube 14 and maintained against said seat by a spring 17 engaging at one end with the ball and the other end seated in a recess in a cap 18 removably cover by stufing boxes 21 and 22 at the outside and inside of the cover. The receptacle 19 is connected to the plunger by a rod 23 of a material which will not be affected by the acid in the bottle and it may consist of glass, said rod extending'into the bottle with the end abutting against the bottom of the bottle and the other end extending out from a restricted portion or neck of the bot- .screw 27 tle and fixed therein by suitable means which will also serve .to seal the bottle as shown at 24, a composition. of glycerin and litharge having been found to'answer the purpose. The bottle is connected to the plunger through this rod 23 for which purpose the projecting end of the rod is screw threaded, as shown at 25, to have screw threaded connection with a disk or head 26 connected to the .The receptacle or bottle 19. is adapted to engage in a tubular sleeve 28 removably connected to the cover 7 to be suspended therefrom into the receptacle 13 and has a shown in Fig. 1. an

7 stricted portion or neck of the bottle by the rigid annular abutment or ring 30 fixed to the lower end and against which ring the bottom of the bottle abuts adjacent its lateral edges in its normal position, as clearly In operation, the parts being in the normal position shown in Fig.1, the plunger is rotated by a handle or hand wheel 29, and due to its threaded connection with the cover 7, which thread is preferably of asteep pitch, the plunger withthe bottle 19 is caused to move downward against the abutment exerting a pressure on the redisk 26 and against the bottom of the bottle from the interior by the rod 23 andcrushing said bottle, thecontents of the bottle dripping onto the soda in the lower portion v of the receptacle 13 and immediately generating gas which "passes up through thet sl'eeve'28 and out ough an opening 31 (Fig. 3) in said sleeve-in line with the tube 14 and through the tube 14, the pressure of the gas unseating the valve 16 and passing into thereservoir where the-expansive force of the gas will exert a pressureon the liquid in'jthe reservoir; the pressure of the liquid unseating the valve 9 and-passing through a tube 8 and out through thej'discharge hose plug 33'whichserves to-close a 12. Should a fire be quickly extinguished the flow of liquid may "be shut on by the valve 10 and the reservoir. relieved of the gas pressure by slightly turninj a screw er opening to the reservoir, vsuch turning of the plug' connecting the reservoirwith the atmosphere, througha "port 34 in said plug a which is normally shut off from .the atmosphere by the wall of the filleropening. To

readily transport the extinguisher it is pro vided with a hand grip or handle 35.. By

end of the plunger by a this construction the acid receptacle being carried by the coveris at all times maintained in a fixed position preventing any accidental knocking of the same with the possible breakage asthe extinguisheris transported froin place to place. Furthermore, the guiding sleeve being removable with the cover may be readily removed for 'possible breaking of said receptacle.

Having thus described my invention I claim:

- 1. In a, fire extinguisher, the combination of a reservoir for a fire extinguishing liquid having a discharge outlet and an opening therein; a removable cover for said opening a receptacle suspended from the openlng into the reservoir having an outlet leading into the reservoir; a plunger carried by the cover. to have movement into the receptacle; and a receptacle carried by said plunger, substantially as and for the purpose specified.

2. In a fire extinguisher, the combinationof a' reservoir for a fire extinguishing liquid having a discharge outlet and an opening therein; a removable cover for said opening;

an open ended receptacle suspended froifr said opening into the receptacle, said-cover also serving to close the open end of said receptacle; a valved outlet leading into the reservoir from the receptacle; a plunger carried by the cover to have movement into the receptacle a receptacle carried by the plunger suspended in the first receptacle;

and an abutment against which the latter receptacle is adapted to be forced by the plunger, substantially as and for the purpose specified. i f v3. In a fire extinguisher, thejcombination got a reservoirfor a fire extinguishing liquid having an outlet and an opening therein; a

removable cover for-said opening; an open ended receptacle suspended from said opening into the reservoir; said cover also serv-- ing to close the opening insaidjreceptacle;

a valved outlet leading. from the receptacle.

into the reservoir; a plunger havingscrew threaded connection with the cover to-have movement into thereceptacle; a receptacle carried by the plunger suspended in the first receptacle; and a fixed abutment with which the receptacle carried by the plunger is adapted to be engaged at the end opposite to which it is connected to the plunger, substantially as and for the purpose specified.

4. In a fire extinguisher, the combination of a reservoir for a fire extinguishing liquid an open ended receptacle for a gas generating material suspended from said opening lnto the reservoir, said cover also servlng to close the open end of said receptacle; an

outlet leading from said receptacle into thereservoir having a valve opening outward from and closing into the receptacle; a plunger having screw threaded connection with the cover to have movement into the receptacle; an entirely closed receptacle for another gas generating material connected to and movable with the plunger; and a sleeve carried by the cover to extend into the first receptacle and surrounding the second receptacle, said sleeve carrying an annular abutment against which the receptacle carried by the rod is adapted to abut, substantially as and for the purpose specified.

5. In a fire extinguisher, the combination of a reservoirtfor a fire extinguishing liquid having a discharge outlet and an opening therein; a removable cover for the opening;

an open ended receptacle for a gas generatng material suspended from said opening 1nto the reservoir, said cover also serving to close the open end of said receptacle; a valved outlet leading from the receptacle into the reservoir; a plunger having screw threaded connection with the cover to have movement into the receptacle; a bottle for another gas generating material; a rod extending into said bottle with one end abutting against the bottom of the bottle and sealed in the bottle with the other end projecting therefrom and having screw threaded connection with the plunger; and a fixed abutment against which the bottom of the bottle abuts, substantially as and for the purpose specified.

6. In a fire extinguisher, the combination of a reservoir for a fire extinguishing liquid having a discharge outlet and an opening therein; a removable cover for said opening; an open ended receptacle for a gas generating material suspended from the opening into the reservoir and having a valved outlet leading intothe reservoir; a plunger having screw threaded connection with the cover to havemovement into the receptacle; a head connected to one end of said plunger having a threaded recess; a bottle having another gas generating material; a rod extending into the bottle and sealed in the bottle with the other end screw threaded and projecting from the bottle and adapted tobe connected to the threaded recess in the plunger head; and a sleeve carried by the cover to surround the bottle and having an annular abutment against which the bottom of the bottle abuts, substantially as and for the purpose specified.

7. In a fire extinguisher, the combination of a reservoir for a fire extinguishing liquid having a discharge outlet and an opening therein; a removable cover for said opening; a receptacle suspended from said opening into the reservoir; a tube to connect the receptacle with the reservoir, one end of said tube being secured in an opening in the receptacle and the other end being in line with an opening in the reservoir and provided with a valve seat; a ball adapted to engage with said seat; a cap to close said opening; a spring carried by said cap to maintain the ball seated in the seat in the tube; a plunger carried by the cover for the reservoir to have movement into the recepe tacle; and a sealed bottle for another gas generating material carried by said plunger, substantially as and for the purpose specified.

GEO. T. PEARSONS. 

